EP1234976B1 - Système de soupape de régulation de pression d'alimentation en carburant pour un moteur à combustion - Google Patents

Système de soupape de régulation de pression d'alimentation en carburant pour un moteur à combustion Download PDF

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Publication number
EP1234976B1
EP1234976B1 EP01129778A EP01129778A EP1234976B1 EP 1234976 B1 EP1234976 B1 EP 1234976B1 EP 01129778 A EP01129778 A EP 01129778A EP 01129778 A EP01129778 A EP 01129778A EP 1234976 B1 EP1234976 B1 EP 1234976B1
Authority
EP
European Patent Office
Prior art keywords
fuel
armature
pressure
closing direction
compression spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01129778A
Other languages
German (de)
English (en)
Other versions
EP1234976A2 (fr
EP1234976A3 (fr
Inventor
Werner Buse
Albert Denne
Janusz Zurke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pierburg GmbH
Original Assignee
Pierburg GmbH
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Filing date
Publication date
Application filed by Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP1234976A2 publication Critical patent/EP1234976A2/fr
Publication of EP1234976A3 publication Critical patent/EP1234976A3/fr
Application granted granted Critical
Publication of EP1234976B1 publication Critical patent/EP1234976B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/54—Arrangement of fuel pressure regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails

Definitions

  • the invention relates to a fuel injection device with a valve arrangement for pressure control of the fuel supply in an internal combustion engine according to the preamble of claim 1.
  • Such fuel injectors with valve assemblies are particularly known in engines with direct fuel injection. Such engines require injection pressures of about 100 to 120 bar. This pressure is generated by high pressure pumps, which are very sensitive to cavitation, ie the supplied fuel must be free of vapor bubbles. In normal engine operation, a flow pressure of approximately 4 bar is sufficient to deliver the fuel vapor-free from a prefeed pump to the high-pressure pump. In the starting phase of the engine, however, the admission pressure in the line system must be increased to approximately 7 bar in order to suppress vapor bubble formation and to ensure injection pressure at the start of the engine without an effective mechanical high-pressure pump. The required pressure increase to 7 bar is achieved by an electromagnetically operable shut-off device and by a front or behind arranged 4 bar - pressure control device.
  • Such a valve assembly requires a relatively large amount of space and is also very expensive due to the increased assembly costs of the other.
  • the present invention is therefore based on the object to provide a remedy for the above-described problems.
  • the magnetic force acts on the armature in the closing direction of the closing element, wherein furthermore a compression spring, which is supported on a housing part, acts in the closing direction on the armature.
  • a compression spring which is supported on a housing part, acts in the closing direction on the armature.
  • This version is a so-called "normally open” variant. Ie. in de-energized state, a low pressure level of about 4 bar is set via the compression spring. In the energized state, a magnetic force is exerted on the plunger via the armature, which together with the compression spring adds up to a high pressure level of approximately 7 bar.
  • the magnetic force acts on the armature against the closing direction of the closing element, wherein a first compression spring acts in the closing direction on the armature and a second compression spring acts in the closing direction on the plunger and both compression springs are supported on housing parts.
  • a first compression spring acts in the closing direction on the armature
  • a second compression spring acts in the closing direction on the plunger and both compression springs are supported on housing parts.
  • the spring forces of the two compression springs add up in the currentless Condition to approx. 7 bar.
  • the magnetic force acts against the first compression spring, so that only the second compression spring acts with a pressure level of about 4 bar in the closing direction of the plunger.
  • the housing may have an armature core movable in the closing direction, against which the pressure spring acting on the armature is supported, whereby the pressure level of the armature can be set in a simple manner.
  • the electromagnetic drive has a proportional magnetic system, wherein the armature core has an elliptical outer contour.
  • the indented armature core is thus not exactly circular at the contacting magnetic flux transition point resulting in a minimum and a maximum of the magnetic force within a 90 ° rotation, which in turn allows a force adjustment.
  • FIG. 1 shows in schematic form the fuel flow in a further not shown internal combustion engine, wherein a pressure control of the fuel supply takes place by a valve assembly 1 according to the prior art.
  • the fuel from a fuel tank 2 is passed by means of a prefeed pump 3 to a high-pressure pump 4, which supplies the fuel at a pressure of about 100 to 120 bar a fuel rail 5, wherein a arranged behind the manifold pressure regulator 6 excess fuel to a pressure of up down to 4 bar.
  • This excess fuel is then passed directly to the valve arrangement 1 or in connection with the fuel present in the short-circuit line 7.
  • the valve assembly 1 consists of a pressure control valve 8 and a check valve 9. From the check valve 9 from fuel is fed back into the fuel tank 2.
  • the shut-off valve 9 is closed, so that the pressure control valve 8 is opened from a pressure of about 4 bar opens out of operation.
  • the prefeed pump 3 thus promotes fuel at a pressure of about 7 bar
  • a pressure regulator 10 is disposed in the fuel tank, which opens at a pressure of more than 7 bar.
  • the shut-off valve 9 is opened by means of an electromagnetic drive, so that now a pressure in the fuel circuit of about 4 bar is realized by the pressure control valve 8. In this case, fuel can be returned to the valve assembly 1 and from there into the fuel tank 2 before the high pressure pump 4 or after the pressure control valve 6.
  • FIG. 2 now shows a valve assembly 1.
  • This valve assembly 1 has an inlet fitting 11 and an outlet fitting 12, which are fluidly connected to each other via a connecting channel 13.
  • the connecting channel can be opened or closed by a closing element 14.
  • the closing element 14 is in a known manner arranged on a plunger 15 which is actuated by an electromagnetic drive 16 and is mounted in a guide bushing 20.
  • the electromagnetic drive 16 consists in a known manner from a bobbin 17, which cooperates with an electromagnetic yoke, wherein both parts are arranged in a housing 19 made of injection molding. Furthermore, an armature 21 is slidably mounted in a further guide bushing 20 in the longitudinal direction. A compression spring 22 acts in the closing direction of the closing element 14 on the armature 21. The compression spring 22 is supported on a displaceably arranged in the housing 19 armature core 23 from. In this way, by the displaceable armature core 23 to a spring force can be adjusted and on the other hand, when the armature core 23 has an elliptical outer contour, the magnetic force. About the plug 24, the power supply of the electromagnetic drive is ensured.
  • the normally open open valve arrangement 1 in FIG. 2 functions as follows:
  • the electromagnetic drive 16 is not supplied with power. Accordingly, no magnetic force is exerted on the armature 21.
  • the valve assembly 1 is in the "normally open” state. In this case, the compression spring 22 has a low pressure level of about 4 bar. If a system pressure which is greater than 4 bar is reached in the fuel circuit, the closing element 14 opens against the compression spring 22 and fuel can be returned to the fuel tank 2. In the energized state, the armature 21 is pressed by the magnetic force and the spring force against the plunger 15. The magnetic force can be adjusted so that a pressure level of about 7 bar is reached.
  • the valve assembly 1 opens only at a pressure level in the fuel circuit, which is higher than 7 bar. The adjustment of the magnetic force takes place here, as already described, via the rotation of the armature core 23.
  • FIG. 3 shows a cross section of an embodiment of the valve assembly according to the invention 1. Same parts have the same functions in this case the same reference numerals.
  • This valve assembly 1 has two inlet fittings 25 and 26 and two outlet fittings 27 and 28.
  • the valve assembly 1 is connected via the inlet fitting 25 directly to the prefeed pump 3 and via the outlet fitting 27 of the fuel to the high-pressure pump 4 is passed.
  • the second inlet fitting 26 is connected to the pressure regulator 6 and returns excess fuel through the outlet fitting 28 into the fuel tank 2.
  • the connecting channel 13 simultaneously assumes the function of the short-circuit line 7 illustrated in FIG.
  • the valve arrangement 1 according to FIG. 3 is in contrast to the valve arrangement 1 from FIG. 2 connected "de-energized closed". Ie. that in the currentless state, the maximum pressure level of about 7 bar by the closing force acting on the closing element 14, is achieved.
  • the present valve arrangement 1 has a first compression spring 29 which acts in the closing direction on the armature 21 and a second compression spring 30, which acts in the closing direction on the plunger 15. Both compression springs 29 and 30 are supported on housing parts and add up to the maximum spring force, which corresponds to a pressure level of about 7 bar. In the starting phase, this valve assembly 1 is thus switched de-energized, so that the fuel is conveyed to the high-pressure pump 4 with 7 bar.
  • the closing element 14 opens, thus releasing the short-circuit line 7 via the connecting channel 13, so that fuel can be fed back into the fuel tank 2.
  • the valve assembly 1 is energized and the magnetic force moves the armature 21 against the compression spring 29, so that only the compression spring 30 with a pressure level of 4 bar acts on the plunger 15, so that the valve at a pressure level, the greater than 4 bar opens and fuel can be returned through the connector 28 to the fuel tank 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (5)

  1. Dispositif d'injection de carburant comportant un système de soupape (1) destiné à la régulation de pression de l'alimentation en carburant sur un moteur à combustion, comportant au moins un dispositif de régulation de pression et un dispositif de blocage pouvant être entraîné par un entraînement électromagnétique (17), dans lequel un carter est prévu comportant au moins un raccord d'entrée et au moins un raccord de sortie qui sont reliés l'un avec l'autre de manière fluidique par l'intermédiaire d'un canal de liaison (13), dans lequel l'entraînement électromagnétique (17) agit au moyen d'un induit (21) sur un poussoir (15) comportant un élément obturateur (14) qui ouvre ou ferme le canal de liaison (13), et comportant au moins un élément de ressort de pression (29) qui agit directement ou indirectement sur l'élément obturateur dans le sens de fermeture, caractérisé en ce que le carter comporte deux raccords d'entrée (25, 26) et deux raccords de sortie (27, 28), le premier raccord d'entrée (25) étant relié directement à une pompe de pré-alimentation (3), afin d'acheminer du carburant par l'intermédiaire du premier raccord de sortie (27) vers une pompe à haute pression (4) et une rampe de distribution de carburant (5) et le premier raccord d'entrée (26) renvoyant du carburant d'un régulateur de pression (6) disposé en aval de la rampe de distribution de carburant, vers le réservoir de carburant (2) par l'intermédiaire du deuxième raccord de sortie (28) et le canal de liaison (13) assurant la fonction d'une conduite en dérivation (7) afin de renvoyer du carburant vers le réservoir de carburant (2) par l'intermédiaire du deuxième raccord de sortie (28) lors du dépassement d'un niveau de pression prédéfini à l'élément obturateur (14).
  2. Dispositif d'injection de carburant selon la revendication 1, caractérisé en ce que la force magnétique agit sur l'induit dans le sens de fermeture de l'élément obturateur, un ressort de pression, qui s'appuie sur une partie de carter, agissant en outre sur l'induit dans le sens de fermeture.
  3. Dispositif d'injection de carburant selon la revendication 1, caractérisé en ce que la force magnétique agit sur l'induit dans le sens de fermeture de l'élément obturateur, un premier ressort de pression agissant sur l'induit dans le sens de fermeture et un deuxième ressort de pression agissant sur le poussoir dans le sens de fermeture et les deux ressorts de pression prenant appui sur les parties de carter.
  4. Dispositif d'injection de carburant selon l'une des revendications 2 ou 3, caractérisé en ce que le carter comporte un noyau d'induit mobile dans le sens de fermeture, sur lequel prend appui le ressort de pression agissant sur l'induit.
  5. Dispositif d'injection de carburant selon la revendication 4, caractérisé en ce que l'entraînement électromagnétique présente un système d'aimant proportionnel, le noyau d'induit possédant un contour extérieur elliptique.
EP01129778A 2001-02-17 2001-12-14 Système de soupape de régulation de pression d'alimentation en carburant pour un moteur à combustion Expired - Lifetime EP1234976B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10107618 2001-02-17
DE10107618A DE10107618A1 (de) 2001-02-17 2001-02-17 Ventilanordnung zur Druckregelung der Kraftstoffzufuhr bei einer Brennkraftmaschine

Publications (3)

Publication Number Publication Date
EP1234976A2 EP1234976A2 (fr) 2002-08-28
EP1234976A3 EP1234976A3 (fr) 2003-05-21
EP1234976B1 true EP1234976B1 (fr) 2006-06-21

Family

ID=7674501

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01129778A Expired - Lifetime EP1234976B1 (fr) 2001-02-17 2001-12-14 Système de soupape de régulation de pression d'alimentation en carburant pour un moteur à combustion

Country Status (4)

Country Link
US (1) US6659424B2 (fr)
EP (1) EP1234976B1 (fr)
DE (2) DE10107618A1 (fr)
ES (1) ES2266081T3 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060118486A1 (en) * 2004-12-06 2006-06-08 Sower Larry P Evaporation of water from a dilute waste slurry to produce a concentrated waste slurry
JP4535033B2 (ja) * 2005-10-14 2010-09-01 株式会社デンソー 減圧弁および燃料噴射装置
WO2008149384A1 (fr) * 2007-06-08 2008-12-11 Ucal Fuel Systems Limited Système d'injection de carburant à pression variable
DE102008060889B4 (de) * 2008-12-09 2022-08-25 Pierburg Gmbh Druckregelventil
DE102009032365B4 (de) * 2009-07-08 2011-04-28 Pierburg Gmbh Elektromagnetantrieb für ein Ventil
DE102009032367B4 (de) * 2009-07-08 2011-04-28 Pierburg Gmbh Elektromagnetantrieb für ein Ventil
EP2380811B1 (fr) 2010-04-23 2012-07-18 Multivac Sepp Haggenmüller GmbH & Co. KG Machine de conditionnement
CN106032852B (zh) * 2015-03-11 2019-10-11 德昌电机(深圳)有限公司 电磁阀
CN204756101U (zh) * 2015-06-05 2015-11-11 厦门科际精密器材有限公司 电磁阀
DE102018222614A1 (de) * 2018-12-20 2020-06-25 Robert Bosch Gmbh Elektromagnetische Betätigungseinrichtung

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US5275207A (en) * 1991-09-07 1994-01-04 Mercedes-Benz Ag Multiway valve

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US5275207A (en) * 1991-09-07 1994-01-04 Mercedes-Benz Ag Multiway valve

Also Published As

Publication number Publication date
EP1234976A2 (fr) 2002-08-28
US6659424B2 (en) 2003-12-09
EP1234976A3 (fr) 2003-05-21
DE10107618A1 (de) 2002-08-29
DE50110244D1 (de) 2006-08-03
US20020113220A1 (en) 2002-08-22
ES2266081T3 (es) 2007-03-01

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